---
title: "WebM to MP4 Converter — Play Anywhere, Private | Compress Pro"
description: "Convert WebM videos to MP4 in your browser so they play on Apple devices, TVs and editors. Audio included, batches supported, nothing uploaded. Free."
canonical: https://compress-pro.com/webm-to-mp4
---

# Convert WebM to MP4.

> WebM to MP4 converted on your device — files never leave.

Turn WebM videos into MP4 **without uploading them** — the whole conversion happens in your browser. WebM plays great in browsers, but Apple devices, TVs, and most editors still want MP4. Drop a batch, keep the audio, and download files that play everywhere.

**No uploads · No ads · Free & open source.**

## How it works

1. Drop files anywhere on the page, click to browse, or paste with Ctrl/⌘ + V.
2. Pick a quality or preset — or set an exact target size and let the tool find it.
3. Compress, compare before/after, and download — individually or as a ZIP.

## Where WebM refuses to play

WebM was built for browsers, and there it is excellent — but step outside and support thins fast: iPhones and iPads, Apple TV and many smart TVs, video editors, office software and upload forms all expect MP4. Converting once to MP4 with H.264 ends the compatibility guesswork.

## Screen recordings are the classic case

Screen recorders that run in a browser — meeting tools, recorder extensions — save WebM, because that is the format browsers record natively. Convert the recording to MP4 and it drops into every editor, deck and chat app; if it also needs to be smaller, [Compress MP4](https://compress-pro.com/compress-mp4) takes it from there.

## Frequently asked questions

### Why convert WebM to MP4?

WebM is a web-first format — iPhones, iPads, Apple TV, many smart TVs and video editors cannot open it. MP4 with H.264 plays essentially everywhere.

### Does the video lose quality?

One re-encode happens, right on your own device. At the default quality the difference is not visible in normal viewing; raise the slider if you want extra headroom.

### Is the audio kept?

Yes — the audio track is carried over or converted as needed for MP4 playback. If your browser cannot manage it, the tool warns you instead of failing silently.

### Do my videos get uploaded?

No. Encoding runs on your own hardware from first frame to last — nothing streams to a server, which is also why there is no file-size cap and no queue. Close the tab and every trace of the footage is gone. Want proof? Run one file through, switch your connection off, and run another — it still works.

## Related tools

- [Compress videos](https://compress-pro.com/compress-video)
- [Convert MOV to MP4](https://compress-pro.com/mov-to-mp4)
- [Convert MP4 to WebM](https://compress-pro.com/mp4-to-webm)

---

Part of [Compress Pro](https://compress-pro.com/) — every tool page has a markdown twin at `<page url>.md`. Full tool index: [llms.txt](https://compress-pro.com/llms.txt)